Combination heater and maintenance wagon



July 14, 1925. I 1,546,185

H. P. ANDREsEN COMBINATION HEATER AND MAINTENANCE wAGoN original Filed Aug. 27, 1920 2 sheets-sneer 1 July 14, 1925. 1,546,185

H. P. ANDRESEN COMBINATION HEATER AND MAINTENANCE WAGON Original Filed Aug. 27, 1920 2 Sheets-Shes#l `2 Inc/@raton Patented July 14, i925,

I'litRMANy I. ANDRESEN, OF CHICAGO, ILLINOIS.

COMBINATION HEATER AND MAINTENANCE WAGON.

Original application filed August (37, 1920, Serial No. 405,387. Patent No.. 1,376,852, dated May 3, 1921.

Divided and. this application led Merch 22, 152.1.

To @ZZ whom t may conccma:

Be it known that I, HERMAN P. ANDRE- snN, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have .invented certain new and useful Improvements in Combination Heaters and Maintenance lwagons, of which the following is a specification.

This is a division of my co-pending application Serial Number 406,387, tiled August 23, 1920 and entitled Combination heater and maintenance wagon.

My invention relates generally to wagons v or portable apparatus for use in road construction and maintenance work, and relates more particularly to wagons or-portableapparatus adapted for use in construction work in which the characteristics of some of the material to be used or acted upon requires the application of heat.

For patching or repairing roads or pavements of a bituminous nature, such for eX- ample as asphalt, tar bound aggregate and the like, it is necessary to heat materials and also to mix them before application to the road or pavement.

For patching or repairing roads or pavements ofthe bituminous nature before referred to, particularly asphalt, it is necessary to remove part of the material around the hole, depression, or other defective place in order that a portable patch or repair can be properly made. This operation can be most readily accomplished by applying heat to the road at that spot, but suitable means for this purpose has not heretofore been provided as a part of a repair wagon or apparatus.

It is an object of my invention to provide a wagon or portable device of such character that the materials to be used for the road repair can be properly conditioned for use, and which shall also be adapted to condie tion the road or pavement for the reception of such road materials. Il aim also to pro,- vide apparatus whereby all of these operations can be carried on simultaneously, if desired andwherewith it shall be possible to make the repair in' less'time, with less labor and at less cost than is possible when employing the apparatus heretofore devised for such work. f

Again it is an object of my invention to provide a device upon which repair ma.- terals can ,be mixed. inici" Lt0 application Serial No. 454,517.

thereof to the road or pavement, maintained at the conditioned temperature while being mixed, if desired, and which shall serve also as a device for applying and localizing heat to the roadlor pavement at the desired place.

It is a particular object of my invention to provide means whereby such materials as wet or damp sand and stone or other aggregate and binder material such as-as phalt, can be concurrently raised to the. desiredtemperature and the necessary quantities of'each prepared at such rate that no delay shall be caused waiting for `one of the materials to be conditioned, and yet which shall be economical in the use of fuel and capable of accurate and easy control.

VMy invention consists generally in the form, arrangement, construction and cooperation of the parts whereby the above named objects, together with others that will appear hereinafter, are attainable; and my invention will be more readily under? stood by reference to the accompanying drawings which illustrate what I consider at the present time to be the preferred embodiment thereof.

i In said drawings: Y

Fig. l, is alongitudinal vertical section of a device` embodying my invention. i

Fig. 2 is a 'View substantially on the line 2*,2 of Fig. 1; and f Fig. 3, is a view substantially on the line 3 3 of Fig. 1.

Apparatus of this character is of particular use in repairing and patching roadsand pavements of a bituminous nature such as asphalt, tar bound aggregate etc., and, for this reason, I shall describe the apparatus with especial relation to such work. This, it shouldv be understood, is by way of illustration and not by way of limitation.

The apparatus here shown'is a wagon and comprises afront axle 1, and a rear aXlepQ upon whichsuitable road wheels are mounte'd for travel upon the ground 3. Upon thesey wheels a superstructure of novel yform is mounted. As here shown it is composed of side plates 4 and 5 which are spaced apart and which together with the front plate 6, rear plate 7 and bottom plates Sand 9 form a boX like enclosure hereinafter termed a tire box.

At the forward part of the aplparatus I arrange a vessel or tank l1 in w ich material l2 is heatedE This material will frelll 'quently be a bituminous material such as tar, asphalt and the like which must be brought to proper temperature for use. The vessel 11 is suitably supported from the side and end plates by means of the angle irons 13 and 1d and the bottom of the vessel is supported somewhat above the plate 8, thereby forming a passageway for the gases of combustion. A smoke stack 15 having a damper 16 `therein leads from the front plate 6.

At the rear end of the wagon I have provided bins or containers 17 and 18 in which, ordinarily, aggregate such as gravel, stone and the like, indicated at 19, will be placed.

Relatively more of the aggregate material is used in repair work than of the tar, asphalt or binder material and the aggregate material is oftentimes wet or damp so that it must be iirst dried by driving off the moisture and then raised to suitableworl ing temperature. I aimjto provide means whereby this can be eifectively accomplished with suoli speed, that no appreciable delay shall be caused due to the necessity of waiting for the aggregate materials to be raised to working temperature. As will'be shown hereafter this results in certain advantages with respect to the heating of the tar, asphalt or other bituminous materials. In order to provide large heating surfaces for the bins 17 and 18 I have spaced inner walls 17 and 18" thereof a short distance apart, kthus providing a passageway 18-therebetween into and through which the products of combustion can flow. Thereby there is imparted/heat to the v lates 17 and 18' which, in turn, give o' their heat to the aggregate material in the bins, --and serve to drive off the moisture and furnish a preliminary heating of the aggregate material The bottom plates of the aggregate bins are preferably inclined at such an angle as will enable the aggregate material to slide or fall by gravity when the control gates 2G or 27 are opened. Before the aggregate material lcan pass through the gates 26 or 27 it must pass by additional heating suriliaces. In this linstance these heating surfaces `take the form of groups of lflues 2S and .29, respectively which extend between ythe lower or bottom plates '25 of the aggrogate bins and the upper plates Y30 and 31, respectively, the plates 30 and 31, paralleling the bottom plates 25. A smoke box 32 is formed above they flues and therefrom *leads a smoke .stack 33 which is provided with a vdamper 34;. I prefer to make the smoke stack 33 larger than the smoke stack l5, as usually Aa .greater part ofthe products of combustion will pass out through the stack I shall now describe the lire boxvand the operation Vof distributing the products of combustion therein. In the present instance a fuel box 35 is positioned in the central lower part of the fire box and is provided with a grate 36 upon which the fuel 37 is supported. rIhe fuel may 'be placed upon the grate through the fuel door 33'. I prefer to place the grate 'substantially centrally of the apparatus so that the gases may 'find theiriescape easily through 'either of the stacks 15 01133. Such gases as are permitted to pass through the stack 15S/,must obviously engage the walls of the vessel 11 and heat the material 12 therein. A greater part ofthe products of combustion will pass outwardly through the stack 33. On their way to the stack 33 part thereof will pass upwardly into the space lfbetween the two aggregate bins and in order to prevent direct flow in the stack 38, or conversely to cause them to flow a longer distance, I have inserted a baille plate 39 which causes such gases to ypass downward under the lower end 39 thereof at which time they can pass upwardly and between the two plates 17 and 18 at the rear` of the bal-lle plate 39 and through the smoke box 32 into the stack 33. A considerable part of the gases will low upwardly through the flu'es 28 and 29 and much of suchk :gas comes directly from the grate and hence will be very hot, resulting in raising the temperature of the fines to a high degree. Thus after the moisture has been driven yfrom the aggregate by the heat imparted thereto lthrough the walls 17 and 18 they have become preliminarily heated and are quickly brought or raised to the final desi-red temperature by engagement with the hot yflue's or pipes 28 and 29. y

By means of the dampers 16 and 34: the effective size of the smoke stacks may be varied. rlhese dampers or valves are pro vided not only for the purpose of regulating the amount vof air that Vshall pass through the grate for combustion purposes, but also to the end that a smaller quantity of the gases of combustion may pass through one of the smoke 'stacks f than through the other. .That is to say, by regulatin'g the dampers 16 and 34 suoli proportion of the total volume of the products of y* combustion generated rmay be caused to iow through one ystack as is desired, and the remainder through the other. Thus all danger of overheating one of the materials and underheating the other is avoided. dit :the same time a much greater quantity of aggregate material can .be raisedto desired temperature with vsuch speed't at Ythe work is not delayed waiting for the heating thereof. Y

For the discharge of the material vfrom the vessel 11 I provide an inclined pipe 119 the lower end' -of which extends for a considerable distance through the fire boX and the upper 'endof'which i-s'carried outside of the iire box but relatively close thereto. I desire to keep the material 12 hot as it flows. I also desire to have a valve controlling the flow thereof positioned relatively close to the vessel 11. If this valve were located within the iire box the material would become coked in the valve. I overcome this diiiiculty and still secure the desired heating by mountingthe control valve 41 just outside of the re box where it can be conveniently controlled from the rear of the apparatus by means of the pull rod 42 and the lever 43. A short length of pipe 40 Connects with the pipe 4() that is arranged in the fire box. At times it may be desirable for some purposes to draw material directly from the vessel 11 and I have, therefore, provided a valve 44 for that purpose. In this manner the material can be properly flowed and heated without any danger of cokin'g or stopping the valve.

For the purpose of mixing the materials which have been heated in the wagon I provide the mixing pan 52. Inasmuch as the mixing pan, its construction and uses are described and claimed in my aforementioned co-pending application no description will be given here. It may be stated here, however, that the materials, previously heated in the wagon, are discharged in suitable quantities upon the upper side of the mixing pan.

The many advantageous features of the construction and operation will be understood by those skilled in this art without further comment.

I claim v 1. An apparatus of the class described embodying` therein a material mixing pan, a firebox, a receptacle within the irebox for heating binding` material that is iiuid when hot, and a pipe for the discharge of said material upon said mixing pan, said pipe having a part thereof extending through the iirebox and a part carried on the outer side of the lirebox, together with a control valve arranged in that part of the pipe that is carried on the outer side of the lirebox.

2. An apparatusl of the class described embodying therein a rebox, a material receptacle arranged within the iirebox and, including an inclined bottom wall, the said receptacle having a discharge opening at the bottom end of said Wall, and a plurality of heating elements in said receptacles and fixed at one end to said inclined bottom walls adjacent said discharge opening.

'3. An apparatus of the class described embodying therein a iire box, a plurality of material bins therein having inner walls spaced apart to form a heating chamber.

therebetween and a plurality of heating elements in each said bins positioned adjacentthe discharge openings thereof, and a baffle located in the heating chamber between the inner walls of the material bins.

4. An apparatusof the class described embodying therein a fireboX, a material receptacle arranged within the klirebox and including an inclined bottom Wall, the said receptacle having a discharge opening at the bottom end of said wall, a smoke box positioned at the top of said receptacle, and a plurality of fiues opening at their bottom ends through said bottom wall near said discharge opening and communicating at their top ends with said smoke box.

5. An apparatus of the class described, embodying therein a fire box, a material bin therein and provided with an inclined bottom, an outlet flue for said lire box and heating means in said receptacle and positioned adjacent said discharge opening, said means comprising a plurality of iues extending upwardly through the bin from the]` inclined bottom thereof.

In testimony whereof, I have hereunto set my hand, this 12th day of March, 1921.

HER-MAN P. ANDRESEN. 

